389779642 has 48 divisors (see below), whose sum is σ = 710379072. Its totient is φ = 157101120.

The previous prime is 389779639. The next prime is 389779651. The reversal of 389779642 is 246977983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1177417 + ... + 1177747.

It is an arithmetic number, because the mean of its divisors is an integer number (14799564).

Almost surely, 2^389779642 is an apocalyptic number.

389779642 is a deficient number, since it is larger than the sum of its proper divisors (320599430).

389779642 is a wasteful number, since it uses less digits than its factorization.

389779642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 592 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 55.

The square root of 389779642 is about 19742.8377392917. The cubic root of 389779642 is about 730.4767274488.

The spelling of 389779642 in words is "three hundred eighty-nine million, seven hundred seventy-nine thousand, six hundred forty-two".